Malicious PDF — malware analysis report

Static analysis result for SHA-256 b650a3229b6bb119…

MALICIOUS

PDF

84.8 KB Created: 2021-09-05 19:54:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 7e44391af3200a578a30c1208e7ff146 SHA-1: 714ebd38dd882b685f804e0b30c5c28eaeb0e9c6 SHA-256: b650a3229b6bb11943006fec6177af5c1e8744af01ec7d82ad62ee69d32b939d
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file exhibits characteristics of a phishing lure, indicated by the 'Fake invoice / payment lure' heuristic and the presence of numerous external URIs. The embedded JavaScript stream, though not fully analyzed due to obfuscation, likely facilitates the redirection to these external links, which are hosted on compromised CMS uploads and disposable domains. The primary goal appears to be directing the user to download a secondary malicious PDF, potentially leading to further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://philabc.ru/uplcv?utm_term=scansnap+ix500+user+manual PDF link annotation
    • http://benardoutlite.com/admin/fckeditor/fckdata/file/sosasotaku.pdfIn PDF document text
    • https://kasihpaham.com/contents//files/tusegubuparesexin.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a42206f06c---2006996294.pdfIn PDF document text
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ee4ae19f7f6---fakekipiziwedavogumakoli.pdfIn PDF document text
    • http://teusz.pl/UserFiles/file/92630352095.pdfIn PDF document text
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16126bdac62b95---51241686130.pdfIn PDF document text
    • http://gesgo.de/userfiles/file/sogat.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7b17917ca5---41046000979.pdfIn PDF document text
    • https://noriupapildu.lt/ckfinder/userfiles/files/48933979978.pdfIn PDF document text
    • http://z-i-f.ru/userfiles/file/zipisajatuzegin.pdfIn PDF document text
    • http://thegrcinstitute.org/app/webroot/js/ckfinder/userfiles/files/83444795395.pdfIn PDF document text
    • http://yuh-tarng.com/userfiles/file/9357542826.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c052e986dc8---wijor.pdfIn PDF document text
    • https://bouveau-consulting.com/userfiles/file/59600022204.pdfIn PDF document text
    • http://baugeraeteverleih.de/benutzerdateien/34184417648.pdfIn PDF document text
    • http://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1612bab1570ae1---54889057715.pdfIn PDF document text
    • http://norilskgu.ru/userfiles/file/vufelupebodawaluvi.pdfIn PDF document text
    • http://labonguyenhoang.com/img-chamthi/files/65590092109.pdfIn PDF document text
    • http://campfirewtx.org/userfiles/file/wokol.pdfIn PDF document text
    • http://sportgalaktik.sk/userfiles/file/dawuvaxuxogolijakeno.pdfIn PDF document text
    • http://cnokorea.com/userfiles/file/19106679422.pdfIn PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607afd14f348e---94131896778.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160c1026205cd6---85932207429.pdfIn PDF document text
    • http://gadkowski.pl/repository/filemanager/file/67683843382.pdfIn PDF document text
    • http://gd-weimi.com/upfolder/e/files/20210611122047.pdfIn PDF document text
    • https://www.cylinder96.ru/admin/ckfinder/userfiles/files/18588771011.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e611.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE611 10848 bytes
SHA-256: 63b5334ed3010b4c7931252c2ea0b41b01af6a15919ca832b68baa74f7f19387
font_01_sfnt_off0000ff1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF1C 17888 bytes
SHA-256: e0af365b9e3b344906a5c5dec6990559ca7434e5767ad2e4b0bd9f728d82deea
font_02_sfnt_off00012db5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DB5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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